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Quantum steerability based on joint measurability
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AbstractOccupying a position between entanglement and Bell nonlocality, Einstein-Podolsky-Rosen (EPR) steering has attracted increasing attention in recent years. Many criteria have been proposed and experimentally implemented to characterize EPR-steering. Nevertheless, only a few results are available to quantify steerability using analytical results. In this work, we propose a method for quantifying the steerability in two-qubit quantum states in the two-setting EPR-steering scenario, using the connection between joint measurability and steerability. We derive an analytical formula for the steerability of a class of X-states. The sufficient and necessary conditions for two-setting EPR-steering are presented. Based on these results, a class of asymmetric states, namely, one-way steerable states, are obtained.
Springer Science and Business Media LLC
Title: Quantum steerability based on joint measurability
Description:
AbstractOccupying a position between entanglement and Bell nonlocality, Einstein-Podolsky-Rosen (EPR) steering has attracted increasing attention in recent years.
Many criteria have been proposed and experimentally implemented to characterize EPR-steering.
Nevertheless, only a few results are available to quantify steerability using analytical results.
In this work, we propose a method for quantifying the steerability in two-qubit quantum states in the two-setting EPR-steering scenario, using the connection between joint measurability and steerability.
We derive an analytical formula for the steerability of a class of X-states.
The sufficient and necessary conditions for two-setting EPR-steering are presented.
Based on these results, a class of asymmetric states, namely, one-way steerable states, are obtained.
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